With a step card, there's really not a lot of room to write (hey, some people may even appreciate that!), but I added a piece to the back panel for a few birthday wishes.
Here's a better view of the dimension you get when you create such a fancy fold. The best part though is that it will still fit in a standard envelope! Here's a Pinterest search with pictures of all the different types of cards you can create with this type of fold. Give it a try... it's simpler than it looks!
Until next time, stay crafty!